How to Change Phonak Wax Guards (Marvel, Paradise, Lumity & Infinio)

If your Phonak hearing aid sounds muffled, quieter than usual, or has stopped working altogether, a blocked wax guard is often the culprit. The good news? Replacing it takes less than two minutes and costs just a few pence per change. This guide walks you through exactly how to do it.

What Are Wax Guards?

Wax guards (also called wax filters or wax traps) are tiny mesh filters that sit at the tip of your hearing aid's receiver (speaker). They stop earwax and debris from entering the receiver and causing damage. Phonak recommends changing them regularly — typically every 2–4 weeks, or sooner if sound quality drops.

Which Wax Guard Does My Phonak Hearing Aid Use?

Phonak uses two main wax guard systems depending on your model:

• Cerustop — used on older RIC/RITE models and some BTE models. Comes in a stick-style applicator with 8 guards.
• CeruShield Disk — used on Marvel, Paradise, Lumity, and Infinio RIC models. Comes as a rotating disk with 8 guards.

If you're unsure which system your hearing aid uses, check the tip of your receiver — if it has a small white or grey disc, you need CeruShield. If it has a small cylindrical filter, you need Cerustop.

What You'll Need

• Replacement Phonak Cerustop wax guards or Phonak CeruShield Disk wax filters (available from Accessories4HearingAids)
• Clean, dry hands
• Good lighting

How to Change a Phonak Cerustop Wax Guard

1. Remove your hearing aid and hold it with the receiver tip facing you.
2. Take the Cerustop stick — one end has a pin (to remove the old guard), the other has a new guard.
3. Insert the pin end into the old wax guard and pull it straight out.
4. Flip the stick around and press the new guard end firmly into the receiver opening until it clicks into place.
5. Discard the used stick.
6. Test your hearing aid — sound should be noticeably clearer.

How to Change a Phonak CeruShield Disk Wax Filter

1. Remove your hearing aid and locate the CeruShield disk (a small rotating disc, usually stored in the charging case lid or a separate case).
2. Rotate the disk to find an empty slot — this is your removal tool.
3. Press the empty slot firmly onto the old wax filter and pull it out.
4. Rotate the disk to the next new filter.
5. Press the new filter firmly into the receiver opening until it seats securely.
6. Rotate the disk one more click to cover the used slot.

How Often Should I Change My Phonak Wax Guard?

Most audiologists recommend changing wax guards every 2–4 weeks. However, if you produce a lot of earwax, you may need to change them more frequently. Signs it's time to change:

• Sound is muffled or quieter than usual
• Feedback (whistling) has increased
• The hearing aid cuts in and out
• The wax guard looks visibly discoloured or blocked

Pro Tip: Keep a spare pack in your bathroom cabinet and change your wax guard on the same day you change your hearing aid batteries — it's an easy habit to build.

Where to Buy Phonak Wax Guards in the UK

You can order genuine Phonak Cerustop Wax Guards and Phonak CeruShield Disk Wax Filters directly from Accessories4HearingAids with fast delivery.